TM 1-1520-238-10 4-50 Change 10 Table 4-16. High Action Display Sight Status – continued Crewmember Description Message CPG CUE UPDT . . . BORESITE The TADS cue update boresight has been selected by having the IAT in manual and the SLAVE latched Low when the BRSIT TADS/OFF switch is placed in the TADS position. CPG INVALID . . . PLT LOS ACQ SEL switch is in the PLT position and there is no valid PLT LOS. CPG TGT = X Indicates selected address in the target NAV indexer (0-9). If X is replaced by a ?, no data is stored in target location. CPG FCC LOAD Power up, checksum test has failed. NOTE The FCC LOAD message will be automatically cleared when the aircraft is airborne. The message clear- ing does not indicate that appropriate corrections have been entered. The following data must be verified and corrected as appropriate. Any or all of the data may be in error: CBHK boresight parameters, AWS harmonization values, aircraft data (PPOS ALT, SPH and MV), laser codes, and waypoint/target latitude/ longitude and altitudes. Table 4-17. High Action Display Range and Range Source Crewmember Message Description NOTE The Fire Control Computer (FCC) is controlling the MUX whenever the symbol located between Kilome- ters and tenths of Kilometers is a colon (:). The Backup Bus Controller (BBC) in control is indicated by a period (.) instead of a colon. P AX . X The range being used is an automatic solution based on the selected sight LOS and radar altitude. The letter A is set in the leftmost RNG-KM thumbwheel on the ARCS panel. Range displayed is in kilometers. CPG AX . X The range being used is an automatic solution based on selected sight LOS and radar altitude. The value 0 is entered through the DEK RNG data entry to command the automatic range solution. Range displayed is in kilometers. Automatic range solution is commanded via [-55] the CDU in accordance with paragraph 3.16. P MX . X A manual range has been entered using the RNG-KM thumbwheels on the ARCS panel. Range displayed is in kilometers. CPG MX . X A manual range has been entered through the DEK RNG data entry. Range displayed is in kilometers even if range entered was in meters.